西藏念青唐古拉地区铅锌银多金属矿成矿特征及找矿方向

Geological Features and Range of Reconnaissance for the Pb-Zn-Ag-Polymetallic Deposit in the Nyainqêntanglha Region,Tibet

在西藏念青唐古拉地区区域地质背景的综合研究基础上,通过对区内已知矿床、矿化(点)的分析,将区内铅锌银多金属矿床初步划分为热水喷流沉积型、热水喷流沉积-岩浆热液叠加改造型、热液脉型、云英岩型、斑岩型、矽卡岩型等六种类型。对西藏念青唐古拉地区铅锌银多金属矿床的控矿因素进行了分析,并指出上石炭-下二叠统和侏罗系地层、断裂构造和古断拗以及燕山晚期的中酸性岩体是区内铅锌银矿床,特别是大型矿床的主导控矿因素,并对该区今后的找矿方向提出了初步认识。

Pb-Zn-Ag-polymetallic deposits in the Nyainqêntanglha region may be divided into 6 types such as exhalative-sedimentary,exhalative-sedimentary-hydrothermal superimposed,hydrothermal vein,greisens,porphyry,skarn types based on regional geological setting and geological features of the deposits.This paper deals with ore control factors and range of reconnaissance for the Pb-Zn-Ag-polymetallic deposits.